Data processing device, data driving device and display device including the same

1 . A data processing device, wherein the data processing device is configured to:

transmit configuration data in a low-speed communication mode;

transition to a high-speed communication mode after the low-speed communication mode and transmitting control data and image data;

retransmit a clock training pattern while maintaining the high-speed communication mode when a lock-fail signal is received during operation in the high-speed communication mode; and

when the lock signal for the retransmitted clock training pattern is not received within a predefined time, the low-speed communication mode is re-executed.

2 . The data processing device of claim 1 , wherein:

the clock training pattern is transmitted to enter the high-speed communication mode after the low-speed communication mode; and

the clock training pattern is retransmitted while maintaining the high-speed communication mode when a lock-fail signal is received during the transmission of image data after receiving a lock signal indicating completion of training for the clock training pattern.

3 . The data processing device of claim 1 , wherein:

when the low-speed communication mode is re-executed, a preamble pattern is retransmitted.

4 . The data processing device of claim 1 , wherein:

before retransmitting the clock training pattern, a recovery start signal is transmitted, and

the recovery start signal is a signal in which high and low levels are alternately repeated.

5 . The data processing device of claim 1 , wherein:

before retransmitting the clock training pattern, a recovery start signal is transmitted, and

the recovery start signal is a DC signal of either a high level or a low level.

6 . The data processing device of claim 1 , wherein:

when power is supplied, the low-speed communication mode is activated to transmit a preamble pattern, followed by transmitting the configuration data, and

when a lock signal for the preamble pattern is received, the configuration data is transmitted, and the high-speed communication mode is activated if the lock signal is continuously received.

7 . The data processing device of claim 1 , wherein:

when a lock signal for the clock training pattern is received, a link training pattern is transmitted.

8 . A data driving device, wherein the data driving device is configured to:

receive configuration data in a low-speed communication mode;

receive control data and image data in a high-speed communication mode after the low-speed communication mode; and

when a lock-fail is detected during operation in the high-speed communication mode, transmit a lock-fail signal to the data processing device, and perform training by receiving a recovery start signal and a clock training pattern while maintaining the high-speed communication mode;

when power is supplied, the low-speed communication mode is activated to receive a preamble pattern;

after a lock signal for the preamble pattern is transmitted, the configuration data is received; and

the high-speed communication mode is activated by continuously transmitting the lock signal.

9 . The data driving device of claim 8 , wherein:

the data driving device comprises a plurality of devices, and each data driving device includes a lock detector.

10 . A display device comprising:

a data processing device configured to transmit configuration data in a low-speed communication mode, to transition to a high-speed communication mode after the low-speed communication mode to transmit control data and image data, and to retransmit a recovery start signal and a clock training pattern while maintaining the high-speed communication mode when a lock-fail signal is received during the high-speed communication mode; and

a data driving device configured to receive the recovery start signal and the clock training pattern and perform training,

a first communication line configured to transmit the image data;

a second communication line configured to transmit and receive the lock signal; and

a third communication line configured to detect an interface connection between the data processing device and the data driving device,

wherein the data driving device is configured to change a signal level of at least one of the third communication line and the second communication line when a lock-fail signal is received while operating in the high-speed communication mode.

11 . The display device of claim 10 , wherein:

the data processing device transmits a clock training pattern to enter the high-speed communication mode after the low-speed communication mode; and

when a lock-fail signal is received during the transmission of image data after receiving a lock signal indicating completion of training for the clock training pattern, the data processing device retransmits the clock training pattern while maintaining the high-speed communication mode.

12 . The display device of claim 10 , wherein the data driving device maintains a signal level of the third communication line at a high level and changes a signal level of the second communication line to a low level when a lock-fail signal is received while operating in the high-speed communication mode.

13 . The display device of claim 10 , wherein the data driving device changes a signal level of the third communication line and a signal level of the second communication line to a low level when a lock-fail signal is received while operating in the high-speed communication mode.

14 . The display device of claim 10 , wherein the data driving device changes a signal level of the third communication line and a signal level of the second communication line to a low level when a lock-fail signal is received while operating in the low-speed communication mode.